【摘 要】
：
In order to overcome the traditional anti-corrosion coating with low wear resistance performance, the Al-Ni-Mm-Fe amorphous and nanocrystalline composite coating deposited by high velocity arc sprayin
【机 构】
：
National Engineering Research Center of Mechanical Product Remanufacturing, Academy of ArmoredForces
【出 处】
：
第十一届全国表面工程大会暨第八届全国青年表面工程学术会议
论文部分内容阅读
In order to overcome the traditional anti-corrosion coating with low wear resistance performance, the Al-Ni-Mm-Fe amorphous and nanocrystalline composite coating deposited by high velocity arc spraying (HVAS) process. This kind of the coating was composed of amorphous, nanocrystalline and crystalline phases. It is proved by scanning electron microscope (SEM) equipped with energy dispersive spectroscopy (EDS), tran mission electron microscope (TEM) and X-ray diffraction (XRD). The results showed that the coating had a dense structure with low porosity of 2.0%. Moreover, the microhardness value was about 340 HV100 and the bonding strength value was about 27.6 MPa. Electrochemical corrosion test results showed that after 1 h immersion in 3.5 wt. % NaCl solutions, the corrosion current density Icorr of the Al-Ni-Mm-Fe coating (13.21 μA·cm-2) is lower than that of pure alumin m coating (24.08 μA·cm-2), and the corrosion potential Ecorr of the Al-Ni-Mm-Fe coating (-1.089 V) is higher than that of pure alumin m coating (-1.394 V). The Al-Ni-Mm-Fe coating has not only well corrosion resistance, but also good wear resistance performance. The wear resistance test results showed that the wear loss of the Al-Ni-Mm-Fe coating (2.56×10-2 mm3) is 10 times smaller than that of pure alumin m coating (30.83×10-2 mm3). It is found that the Al-Ni-Mm-Fe amorphous and nanocrystalline composite coating had a double function of the resistance to corrosion and wear.
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